Throw-off mechanism for traveling-cylinder presses



July 15, 1930. P. F. cox ET AL THROW OFF MECHANISM FOR TRAVELING CYLINDER PRESSES 2 Shoots-Sheet i E'iled Nov. 19, 1928 ATTORNEY;

July 15, 1930. F c ET AL 1,770,843

' THROW OFF MECHANISM FOR TRAVELING CYLINDER PRESSES Filed Nov. 19, 1928 2 Shoots-Sheet 2 til? 15, 193

Wests wasn't F. "cox AND dossier; .L'. -'or orrrcn eo,rumors, nsstenoiis iro. mm qoss PRINTING PRESS-COMBAE'Y, CF:GHICAGQLILEINOIS. neonroR-A'rroN or snm'norsg i.

m wemm mmsm ro rt 'nitiwnnine-ey tmnnn Ems Ap ilicaition tied Novenb -ieims --fsei-ie1' ivlor'f'eoia'zoi Our invention relates to printing presses forthrowing trgti 'eling" impression cylinders I [on and off impression in Whiehithe Web'is printed "the co -o peration or a stationary type bed and travelingimpression cylinder such for example asshoWnin CO2; Patents N01988 548. of April 4, 1911,3116. N0. 1.4%57;

501,"0fJ une "5, 1923, which *pr'esses are rovided with mechanism for? throwing the imis 'pressio'n cylindersofi" impression after thei'l impression stroke, 'ztndkeeping sameclezi r' of the type form on the stationary beds during their return stroke (during "which time the web of paper is advanced he'tween the type end'eylinders) and for then throwingthe cylinders on iinpress ioir so that they will press the 'Wfil) into contact with the type forms to take sin impression upon the iveb of papeiiduring their impression stroke.

More perticularlythe invention is an improvement upon the means for raisingg' and flowering, endholding the reciprocating 'cylinders in0n impression and ofi impression positions shown; described and more broadly claimed in our :-Letters 'Pttt'ent No..

1,747,662, dated Feb. 18. 1930, snd thepresent invention includes novl-closedor race.

cams operatedv bytheswingingfinovement of the pitinan, so formed that the swinging movement of thegpitman relative tothe crossheads will positively and accurately cause hoththe throwing on and throwing elf of the impression cylinders and also hold them in the d sired: ositions on theirrespeg "tiv'e strokes; l r

While the invention isip rimarily designed one stroke "and ""tliroivn" on impression L on illustrate the inventi onesttpplid to fit Well .3 known type of traveling: cylinder Web perfecting press, sufiicient of such pressheing illustrated to enablethe inventionto be infoi rer the forins. j 1

"1g.2 s z nenlarged detailed'viewshow V ing by lneansof dotted llIlQS some of the dif:

ence to the aecoinpanyingdrgtiviirgs which clearly 'iinder stobd bythose fgrniligr with In the drawings protection 'is desired. I

EigLi-Iis a partial side" elevation df awb "printing press shown; our novel mechanism "tor throwing the cy lnders on? or oft. impression and forfholding'fthe seine on or "f 0ifimpression Whilethe cylinders arepess- A v V .7

ferent positionsessumed by the cams and.

cylinders duringthe operation ofthe .pre ss. Fig, Sfisa. detail Vieivior" the parts shown. in Fig. 2.

a=slight I modification ofthe invention. 7

Fig; 4.-is ejVieW siinilar to Fig.2 showing Fig. 5 is ayview similar to Fig. 4-, showing a,

slight modification.

Inth'e drawings 1 endl designate pztre-lle l 3 ii hich Fare guided in longitudinal guide- Ways 9 in the sidesofthe' press frame. Said crossheadsfi are reeip'rocated soils to move the cylinders 2i'andf2 "hack and forth over 1 the hedghy nieans of pit nen 4cor nected to pinsor studs 3%onthe crossheatlsfifand to "crankl alns on crankge'ers 4?,1nountedon shaft49 on the'niain frame.

" .Thecylinders are usuillyn oi'intedin adv V jus't'zihle bearings which can he I'reis'e'd or cable to Is1ngle acting presses 5 endto' sheet; and to other typeset-machines 1n lowered to throwthefcjlinders one ofi impression; ordinarily eccentric :r'oeking bushdel e iior intermittently -d'i awerr impressions-l t .tftveling. we; s e

type bed-s arranged one over the other in a 'su tahlernaln .flUIlQ-Q.

i no part of the present invention.

'The means for feeding, guiding, leading and sh fting the webs may be of any desired construction and are well unlderstoodyand form The general. construction and arrangement of the aforesaid parts in this type of pressesare well known'and need no further detailed explanation herein.

In the press shown the cylinders are on impression and print only when moving on one. stroke say to "the left,iand are thrown off impression during their return stroke.

In the construction each eccentricbushing 5 is provided with an arm 5 which prefer ably carries .a stud or roller 5 which engages a closed or, race cam slot in a cam memher 6 formed on orri idly attached to the pitmen 4.

i Each earn 6 is mount-ed on and lot the crosshead.

pin 4: by the wheel l lhe operation of each cam 6 upon the related eccentric bushing 5 is the same, for

each and both cylinders 2 and 2 and the description of the construction and operation I of one will explainboth. V

fixed relatively to the pitmen 4; when in operation; but has arocking movement relative to the re lated cylinder bushing during the reciprocation of the cylinders, due to the swinging movement of the end of the pitman (on which the cam is mounted) upon the pin 3 As shown in Figs; 2 and 4 each cani member 6 has-a cam slot provided with an approximately central 01111113011101 6" and 1th dwell portions 6 and 6 at-opposite ends of cam portion 6.

Each cam 6 being formed on or rigidly attached to the pitman a is rockedby the swinging movement of this'pitman on the pin 5*; the swinging movement of the pitmen i being due to the orbital movement of the The upper and lower cams 6, Figs. 1 and 2, are alike but are reverse oneto the other.

lVhen the cam portion 6 moves pin 5 upwardly it will rock the eccentric lnishing 5 soas to move the cylinder away from the line of impression thus throwing the cylinder oii' impression. When the cam por the axis 41 of the wheel l to :a position vertically oelow it; and (during the next onehalf revolution of the wheel 4 the cams 6 will be rocked anti-clockwise during the movement of the pin 49180 from aposition directly below the axis of wheel t to a position directly above said axis. Of coursethc extent and time of movement of r the cum 6 varies according'to the angularity of the pin l relative to the axis of the wheel 4. When the pin t, is on the dead center (between the pin 8 and the axis oi wheel P.) the cam 6 is practically still, but it .begins to reverse its movement as the pin 4;" .passes the dead'centcr.

sissumingLthat 't is preferable. that the cylinder he of? impression during the outward'stroke of the .crossheads (i. e. away from the wheel 4*) and" should be on inipression during the inward stroke oi the crossheads e. towards the wheel at) the portions 6, '6", '6 of the cam slots are so formed and calculated(withrespect to the swinging movement ofthe pitmen 4 on the pin 3 and consequentrocking movement of the cam 6 relative to said pin-,)-that on the .inward stroke of; the cylinder, and afterit has cleared the type-form on the bed the cam portions 6 wiilbeginto move the pins 5 upward and rock the eccentrics 5 so as to raise the cylinders ofi' impression; and the pins 5 will enterand move in the dwells ('3 ot' the slots and hold the cylinders oii" impression duringthe outward return stroke of the cylinders until they have cleared the outer end of the type forms on the bed; then cam portions 6 will again reversely engage the pins 5 andvmove them downwardly and rock the eccentric 5 so as to lower the cylinders to the line of impression before the-cylinders reach the printing form, during their inward stroke; thus throwing the cylinders on impression; and the pins 5 will enter dwells 6"" and hold the cylinders on impression until they have cleared the inner ends of the type forms on their inward stroke; then the cam portions 6 Willa-gain engage the pins 5 and again move the cylinders oii impression as above described. Thus afterthe cylinders clear the forms on their inward printing stroke they are thrown off impression and are held off impression during their outward return stroke until they have cleared the outer end of the forms; then'the cylinders are thrown on impression andheld in such position during their inward printing stroke until they have again cleared the inner ends of the torins aiid then they are again thrown off" impression as described.

By reason of the rocking of the cam 6 the cam portion 6 is caused to move the pin 5 upwardly adjacent one end of the stroke of the cylinders, and downwardly adjacent the other end of the stroke of the cylinders and the, dwellportions 6 and 6 of the cam slot will alternately hold the cylinders in thrown on and thrown oil. positions as describedand the cylinders are held in such thrown on or thrown off positions without requiring any auxiliary devices such as shown in Cox Pat ent 1351501, and no other auxiliary means with present ca e by-meanjs or closed cam's'lot,

"We are able to dispnseivith onefdijmend "one pin on the "eccentric bushing end to simfpli fy the construction offthe 'c'z im member itself. I f i The pin '3 could be jlacecjljinfdi'r :ct line I "with the center of the "axles "(if the i cylinders 2, 2 ,'b1itinorde'r'to accentuate the movement of the chins '6 'relatrveto tlrefajiies of the cjlinder'sbr bushings :5; theip in 3Kmay be placed to one sideofe plane including. the

I centers of both line {impressioncylinders;

""pret'era bly We place it to'the outerfsidie' of "aniount "of rocking move e t of "the cams. 6 relative I to thefla'zges of the cylinders is anifil fied over hat "their movementj would be; {if the pin. 3 was inrline ithfthe' axes (if the cylinders; and "this additional engineered movement'isftztken advantage of in. calciile-ting the time rind throw of the cam po'rtionsli o'f thecam slots and thedwellportions"6 end;

- 6 thereof.

"formed integral with the eccentric 5 if desired, or "can be formed on a plate 5 which cen be adjustzibly secured to one end the bushingby means of slots and bolts 51'asindica'ted in tjwhich will enablezitheieccentrics 5 tol'be independently adjii'sted'lotzttorially of th'e bearingsrwhile maintaining" the proper relative positions and engagement 'otthe Pins 5 "and the cam slots incain mem- Y bers6. I

When the press has tw o lbeds and two cylinders as lndlca teddn 'Figs.dl'ztnd 2,, each'eyll'nder ma be operated lnthernanner descr bed;

'biit'the cam slot in the "lower caflin 'meniber is reverse to that'in thejupper c'zim member; to produce the 'proper similar simultaneous raising and lowering of the cylindersl'in' the ni'anner above described. w

In the modification shown in 'Fig. 5' t:he

cam members 6 1' are shdwh as "far ed separately from the pit'rneniiindse'cnr edl thereto by "means of bolts 6 I Each earn member '6" is, provided with a slot having cam portion ti and dwells b -and 6 at opposite ends ofthis" cainzportion, as in Figs. lend-2, and each e a-n1 slot operates the adjacent eccentric. as r l d for the purpose hereinbeforedescribed. The

slot in the lower cam 'memberfi in this instanc'e'is'shQWn as lying to-the outside of pin 5 and the slot in the upper cam memb'eres ii j provided fwith an adjusting member '5? to regulate or adjust th'e lengtho'f saidrod or pression The arm "5 'c:trrying the pin 5 can be "ing "on and said throwing on cli' means heads are reciprocal-ted.

'5; as by ine-s e r adjusting bolts 5 "as indi q 1 disttnc e bet'wiv'efejn th'efpivotal connections of {Withfthis constrnctionit iis obvious that-when the "upper "czjln member 6 rocks" the eccentric bushing 5 'ojft he upper cylinder; zts lrereine'd, th e rockin oughf the conn'ec centricbn'sfhingsof the olweji cylinder-1 2 {and consequently both cylinders2 and; 2?,Wil1 be "thrown on orthrownfofi' impression and be held on ojrfofi imp'ressionyasf ztbovef describe dfge V remsingl'cem member @1161 pin' 01 bythe' usepf asingkset of can s G and pins 5?.

Vhilerbckingfeccentricbushings 'p'roilide a simpleendeasyinean'sbt raising and ldw'vermg the cyhnde'rs; otherjdex' ices for I'EL 1S1'I1g "and lowering th sm be e inployed within theiscop-eof ur intention' I cylinder,{reciprocating crossheads for niov-" ingfthe 'ciylin denfand means on alcrossheed fort-brewing the "cylinder on and off impres 'eionf; piemenpivqtany connected with the c'ro'ssheads at points to one side "oiffthep l'ane means'On theitmen whereby the said. three means areoper-ted "a sthe :crossheadsare' reciprocatedQ'- V, d I *2. In prlntmgpress having astzit onztry 7 bed, 'a traveling impression cylinder cooper.-

ating Withthe bed; cross'heads in whichzsaid I :cylinder is ineunted'ynndmem sen: the crossh'ead (ii-throwing the cylinder on ofl impress1 n.; crank "heels, jpitr'nen pivotally connected With the Wheels and'Wiflffihe crosshe'efids points "to; one side pot the iplii'ne @cdntai nin the axes of the cylinders and cams on the jp'itmen edept ed to estimate the 3. In a .printing press having traveling cylinders, reciprocating ero'ssheads for movjing- -the.:cylinders, and "Them 1son the cressheads forrthrowing the cylinders; on an'd off 5 impression, spitmen pivotallycenneetedwith its the lcross- "containing the'nxes "of -theTc x lifnderls; and O 1 thecrosshe'ads "atizpoints to one i'side o'f aipltine containing thejaxes "of both cylinders and Otmt'ed;onlthepitmen nd 01f means whereby the latter are operated asv the crossheads are reciprocatech 4.; Ina printing press hav ngfstat onary beds, traveling impression cylinderscooperatadapted to actuate the said throwing on and oii' means as the crossheads are reciprocated.,

5. In a printingpress havingstationary beds, traveling cylinders COOPGFfltlIlgBll'h the beds; crossheads for moving said cylinders;

means on the .crosshejads for throwing the cylinder on and off impression;-reciproc'able pitmen pivotally connected with the crossheads at points to one side of a plane containing the axes of both cylinders; andmea-ns fixedly mounted on' th e pitmen whereby the said throwing on'anjd off means is operated. 6', In a printing press having stationary beds, traveling cylinders cooperating with "the, beds; crossheads ifor movingsaid cylinstroke and on impression on thereturn stroke. 7 In a printing press having a traveling cylinder 'mounted in reciprocating crossheads; oscillating devices on the 'crossheads der's; means on the crossheads for throwing the cylinder on and oft impression; recipro cable pitmen -,pivotally connected with the crossheads at points to one side of a plane including the centers of both cylinders; and closed cams on oneof the pitmen whereby the said throwing on and oil means is operated by the pitman while thecrossheads are moving and the cylinders held oii impression on one for throwing the cylinder on and ofil impression; and pitmen .pivotallyconnected with the crossheads and closed cams carried by the itmen whereby the said throwing on and oil devices are positively operated in both direc tions by the swinging movement of the pitman. p J

8i In a printing press having a traveling fcylinde r mounted in reciprocating crossheads; oscillating devices on the crossheads for throwing the cylinder on and off impression; and pitmen pivotally connected with the crossheadsat points to one side of the center ofthe cylinder; and closed cams on one of thepitmen whereby the said throwing on and off devices are positively operated in both directions by the swinging movement of the pitman.

9. In aprintingpress having a stationary vices, said slots causing the sald devices to bed, atrave'ling cylinder; crossh'eads in which said cylinder is mounted, means on the crossheads for throwing the cylinder on and 0E impression, crank wheels, and pitmen pivotally connectedjwith the crank wheels .and

' also pivotally connected with the crossheads;

members on the pitmen having cam slots engaging members on the 1 throw off means to operatesaid throwing onand oii' means as the, crossheads are reciprocated. v

l0. Ina printing press having a stationary bed, a traveling cylinder; crossheads in which said cylinder is mounted, meansion the cross heads for throwing the cylinder on and oif impression, 'crankwheels, and pitmen pivotally'connected with the crank wheels and also pivotally connected with the crossheads at points toone side of the center of the cylinder; cams on the pitmen having slots engaging memberson the throw off and on means whereby said means are operated as the crossheads .are r'eciprocat'ed to hold the cylinder oii' iiiipress'ionon one stroke and on impression on the return stroke. v

"11. In a printing presshaving a stationary bed and traveling cylinder cooperating with saidbe'd; crossheadsin which the cylinder is mounted ;,devices on the crosshead for throw the cylinder on and ofl impression; and pitman pivotally connected with the crosshead; a member onthe end of the pltman adiacent the pivotal connection thereof to the 1 crossheads provided with a'cam slot engaged by a member of the said devices, said camslot causing the said devices to operate while the crosshead is, moving and move and hold the cylinder oil' impression on one stroke and on impression on the return stroke.

12. In a printing press having stationary bed and traveling cylinder cooperating with said bed, a crosshead in which said cylinder mounted; a crank wheel, a pitman pivotally connected with the crank wheel and pivoted to the crosshead; means on the crosshead for throwing thecylinder on and oil impression, including anarm extending adjacent thepivoted end of the pitman; a cam member on the pitman adjacent the pivotal connection thereof to the crosshead having a cam slot engaged with said arm whereby the said throwing on and off means is actuated as the crossheads are reciprocated to hold the cylinder oil impression on one stroke and on impression on the return stroke.

18. In a printing press having stationary beds andtraveling cylinders cooperating with said bed; crossheads in which the cylinders are mounted; devices on the crossheads for throwing the cylinderson and ed impression; and pitmen pivotally connected with the crossheads at a point to one side of a plane including the centers of the cylinders; members on the pitmen'adjacent the pivotal connection thereof to thecrossheads having camslots engaging members'of the said deoperate while the crossheads are moving and move and hold the cylinders oii' impression on one stroke and on impression on the return stroke. V

' 14. In a printing press having stationary beds and traveling cylinders cooperating with cam said 'beds, crossheads in. which said cyiinders are mounted; pitmen pivotally connected with thecrossheadsat points to one side of a plane including the centers of the cylinders, 1

means on the crossheads for throwing the cylinders on 'and off impression including an H arm extendmg ad acent "the pivoted end ofthepltmen; cam members on thepltmen adjacent the pivotal connections thereof. to

the crossheads, said ca-m members having cam "slots engaged wlth said arm, whereby the :said throwing'on and E means areactueted as the crossheadsere reciprocated to holdthe J J cylinders ofi nnpresslon' on one strokeand on impression on the return stroke,

PAUL F. cox.

JOSEPH L. 00X," 

